<template>
  <div class="login-container">
    <!-- 给表单绑定自定义model属性(表单数据对象)，是一个对象，表单中的输入框双向绑定对象中的属性 -->
    <!-- 表单绑定rules校验规则 -->
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="off" label-position="left">

      <div class="title-container">
        <h3 class="title">
          <img src="@/assets/common/login-logo.png" alt="">
        </h3>
      </div>
      <!-- 给 el-form-item 绑定prop属性，值为对应的校验规则 -->
      <el-form-item prop="mobile">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <!-- 给 el-input 双向绑定表单数据对象中的对应的属性 -->
        <el-input
          ref="username"
          v-model="loginForm.mobile"
          placeholder="请输入手机号码"
          name="username"
          type="text"
          tabindex="1"
          auto-complete="off"
        />
      </el-form-item>

      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.password"
          :type="passwordType"
          placeholder="请输入密码"
          name="password"
          tabindex="2"
          auto-complete="off"
          @keyup.enter.native="handleLogin"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
        </span>
      </el-form-item>

      <el-button :loading="loading" class="loginBtn" type="primary" style="width:100%;margin-bottom:30px;" @click.native.prevent="handleLogin">Login</el-button>

      <div class="tips">
        <span style="margin-right:20px;">账号: 13800000002</span>
        <span> 密码: 123456</span>
      </div>

    </el-form>
  </div>
</template>

<script>
import { validMobile } from '@/utils/validate'
import { mapActions } from 'vuex'
export default {
  name: 'Login',
  data() {
    // 用户名的自定义校验规则，具体的规则从utils/validate中导入

    // 注意：1、自定义校验规则中不能直接return，必须返回callback，
    // 2、确保自定义校验规则的每一个分支都调用了callback回调，否则组件的validate方法无法进入回调函数！！！
    const validateMobile = (rule, value, callback) => {
      if (!validMobile(value)) {
        callback(new Error('请输入正确格式的手机号码！'))
      } else {
        callback()
      }
    }
    // 密码的校验不需要自定义了，直接在loginRules中定义6-16位即可
    return {
      loginForm: {
        mobile: '13800000002',
        password: '123456'
      },
      loginRules: {
        mobile: [
          // 第一条是输入与否的校验
          { required: true, message: '请输入手机号码', trigger: ['blur', 'change'] },
          // 第二条是自定义校验规则
          { validator: validateMobile, trigger: ['blur', 'change'] }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: ['blur', 'change'] },
          { min: 6, max: 16, message: '密码必须是6-16位', trigger: ['blur', 'change'] }
        ]
      },
      loading: false,
      passwordType: 'password',
      redirect: undefined
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  methods: {
    ...mapActions('user', ['login']),
    // 密码的显示与隐藏
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    // 在密码输入框点击回车或者点击登录按钮时，先处理表单校验，即 form 组件的validate方法！！！！
    handleLogin() {
      // 先进行表单校验，form组件的validate方法
      this.$refs.loginForm.validate(valid => {
        // 校验通过
        if (valid) {
          this.loading = true
          this.login(this.loginForm).then(res => {
            // 登录成功
            // !注意：因为后台的响应信息中的success才是真正登录成功与否的标记，所以要对响应中的success字段进行判断，否则只要有响应结果都会走Promise的then，然后走这里的then，视为登录成功，跳转到主页
            console.log('登录成功', res)
            this.$router.push('/')
          }).catch(err => {
            console.dir(err)
          }).finally(() => {
            this.loading = false
          })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    }
  }
}
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg:#283443;
$light_gray:#407ffe;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  background-image: url('~@/assets/common/login.jpg');
  background-position: center;
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.9); //输入登录表单的背景色
    border-radius: 5px;
    color: #454545;
    .el-form-item__error {
      color:#fff;
      font-size: 14px;
    }
  }

  .loginBtn {
    background-color: $light_gray;
    height: 64px;
    line-height: 32px;
    font-size: 24px;
  }
}
</style>

<style lang="scss" scoped>
$bg:#2d3a4b;
$dark_gray:#889aa4;
$light_gray:#eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
